Vintage wool, Woolrich mostly, and a vintage Timberland Goose Down jacket to stuff in my pack. Wool is found at yard sales, goodwill, flea markets. Oh and if you haven't tried alpaca socks, its the warmth of wool but breathable so feet stay dry. I'm sorry I have friends with the expensive brands out there today that cost $600 for a jacket and they are not as warm as I am.